Umbrella shelter



FIG. 1 is a perspective view showing my new design.

FIG. 2 is a top view.

FIG. 3 is a bottom view.

FIG. 4 is a front view; and,

FIG. 5 is a left side view.

The right side view is a mirror image of the left side view.

The shaded areas in FIG. 3 are screen mesh and are not claimed.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an umbrella shelter, as shown and described. 